\[ \Bigg(\bigg(\Big(\big((x)\big)\Big)\bigg)\Bigg)\quad 
\Bigg[\bigg[\Big[\big[[x]\big]\Big]\bigg]\Bigg]\quad 
\Bigg\{\bigg\{\Big\{\big\{\{x\}\big\}\Big\}\bigg\}\Bigg\} 
\]\[ 
\Bigg\langle\bigg\langle\Big\langle\big\langle\langle x 
\rangle\big\rangle\Big\rangle\bigg\rangle\Bigg\rangle\quad
\Bigg\lvert\bigg\lvert\Big\lvert\big\lvert\lvert x 
\rvert\big\rvert\Big\rvert\bigg\rvert\Bigg\rvert\quad
\Bigg\lVert\bigg\lVert\Big\lVert\big\lVert\lVert x 
\rVert\big\rVert\Big\rVert\bigg\rVert\Bigg\rVert \]
